CN109098687A - Single stop grouting plug retrusive sublevel grouting device and method suitable for crack rock - Google Patents
Single stop grouting plug retrusive sublevel grouting device and method suitable for crack rock Download PDFInfo
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- CN109098687A CN109098687A CN201811182774.5A CN201811182774A CN109098687A CN 109098687 A CN109098687 A CN 109098687A CN 201811182774 A CN201811182774 A CN 201811182774A CN 109098687 A CN109098687 A CN 109098687A
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- outer tube
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000011435 rock Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000002002 slurry Substances 0.000 claims abstract description 51
- 238000002347 injection Methods 0.000 claims abstract description 30
- 239000007924 injection Substances 0.000 claims abstract description 30
- 239000004568 cement Substances 0.000 claims abstract description 16
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011440 grout Substances 0.000 claims abstract description 10
- 238000010992 reflux Methods 0.000 claims abstract description 8
- 238000007569 slipcasting Methods 0.000 claims description 110
- 238000005553 drilling Methods 0.000 claims description 18
- 239000004927 clay Substances 0.000 claims description 13
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 210000004911 serous fluid Anatomy 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of single stop grouting plug retrusive sublevel grouting devices and method suitable for crack rock, including inner tube, outer tube, water injection pipe, expansion type stop grouting plug, interior tube valve, outer tube valve, water filling tube valve, inner tube check valve and outer tube check valve；Expansion type stop grouting plug is penetrated through and be fixed on outer tube by outer tube, is connected inside water injection pipe and expansion type stop grouting plug, and can be filled the water by water injection pipe into expansion type stop grouting plug expands expansion type stop grouting plug；Outer tube is being provided with outer tube valve into slurry position, pulp position is provided with outer tube check valve, prevents slurry reflux for conveying cement grout, outer tube；Inner tube is set to outer tube, and inner tube is being provided with interior tube valve into slurry position for conveying waterglass slurries, inner tube, and inner tube is provided with inner tube check valve in pulp position, prevents slurry reflux.
Description
Technical field
The present invention relates to geotechnical engineering grouting and reinforcings and water blockoff field, and in particular to a kind of list suitable for crack rock stops
Slurry plug retrusive sublevel grouting device and application method.
Background technique
In underground engineering, slip casting is the effective means reinforced crack rock and block underground water.Segmenting slip casting and common
The grout mixing that can achieve more evenly is compared in slip casting, and slip casting effect is more preferable, particularly with the strong stratum of heterogeneity, is divided
Section slip casting is more significant compared to the advantage of common slip casting.Retrusive grouting method is a kind of important method for realizing segmenting slip casting,
Current retrusive segmenting slip casting method mainly has two kinds of grouting methods such as drilling rod retrusive, mini-valve tube retrusive, and drilling rod retreats
Formula grouting method uses drilling rod disposal pore-forming, and drilling rod is retreated using drilling rod directly as Grouting Pipe and realizes retrusive segmentation note
Slurry, but the grouting method lacks effective quarantine measures between different slip casting sections, causes slip casting controllability limited, Bu Nengbao
It demonstrate,proves all slurries and enters target slip casting section；The slip casting of mini-valve tube retrusive is mainly by the two kinds of slip castings of slip casting outer tube and slip casting core pipe
Pipe is constituted, and slip casting core pipe both ends are provided with stop grouting plug, is segmented using the mobile realization of internal core pipe, and slurries enter two and only starch
Between plug by note medium, however mini-valve tube retrusive grouting mode needs to cause structure complex using two stop grouting plugs,
Situations such as component damage easily occurs during extensive mortar depositing construction reduces slip casting efficiency.
Summary of the invention
In order to solve the deficiency of existing retrusive segmenting slip casting technology, it is suitable for splitting the purpose of the present invention is to provide one kind
The single stop grouting plug retrusive sublevel grouting device and application method of gap rock mass, can be realized by the device and method to target slip casting
The segmenting slip casting in region, and have many advantages, such as that structure is simple and convenient to operate, is hardly damaged.
Retrusive sublevel grouting device of the present invention is as follows:
A kind of single stop grouting plug retrusive sublevel grouting device suitable for crack rock, including inner tube, outer tube, water injection pipe,
Expansion type stop grouting plug, interior tube valve, outer tube valve, water filling tube valve, inner tube check valve and outer tube check valve；The expansion type
Stop grouting plug is penetrated through and be fixed on outer tube by outer tube, is connected inside the water injection pipe and expansion type stop grouting plug, can pass through
Water injection pipe is filled the water into expansion type stop grouting plug expands expansion type stop grouting plug；
The outer tube is being provided with outer tube valve into slurry position, is setting in pulp position for conveying cement grout, outer tube
It is equipped with outer tube check valve, prevents slurry reflux；
The inner tube is set to outer tube, and inner tube is provided with for conveying waterglass slurries, inner tube into slurry position
Interior tube valve, inner tube are provided with inner tube check valve in pulp position, prevent slurry reflux.
Further, the distance of the expansion type stop grouting plug centre distance inner tube check valve is the half of slip casting segment length,
In order to make pulp position at the center of slip casting section, reach better slip casting effect.
Further, the distance between the inner tube check valve and outer tube check valve are less than 10cm；In order to make in outer tube
Cement grout with the waterglass slurries in inner tube are as early as possible meeting and mixing, the time spent by grout cures is less.
Further, a kind of single stop grouting plug retrusive sublevel grouting device user suitable for crack rock
Method, its steps are as follows:
Step 1: sublevel grouting device is made according to design slip casting segment length.
Step 2: it drills on working face according to design hole location, terminates when drilling is to projected depth.
Step 3: by sublevel grouting device tripping in first segment slip casting section corresponding position, expansion type stop grouting plug center is enabled to be located at
On first segment slip casting segment boundary.
Step 4: expansion type stop grouting plug is filled the water by water injection pipe, target water injection pressure is higher than design grouting pressure, reaches
Water filling tube valve is closed after to target water injection pressure.
Step 5: normal slip casting is carried out by outer tube, slurries enter corresponding slip casting section, when grouting pressure and grouting amount reach
To after design requirement, normal slip casting terminates.
Step 6: slip casting section is closed.Cement single slurry is injected by outer tube, waterglass, the two are injected by inner tube
It mixes in specific proportions, after cement-water-clay system reaches initial set, opens the interior of water filling tube valve removal expansion type stop grouting plug
Sublevel grouting device is retreated a distance by portion's hydraulic pressure, and expansion type stop grouting plug center is enabled to be located on next section of slip casting section boundary.
Step 7: after cement-water-clay system solidifies and has some strength, slip casting section closed section is formed, is led to
It crosses water injection pipe to fill the water expansion type stop grouting plug, carries out the normal slip casting of next section of slip casting section later.
Step 8: step 4 is repeated to step 7, until reaching scheduled slip casting segmentation number.
In above method, expansion type stop grouting plug water injection pressure is higher than design grouting pressure, guarantees in design slip casting pressure
Expansion type stop grouting plug can sustain the pressure that slurries apply it under power.Normal grouting serous fluid uses cement single slurry.In step
In six, slip casting section is closed using cement-sodium silicate double liquid, outer tube injects cement single slurry, and inner tube injects water
Glass, the total volume drilling volume corresponding not less than slip casting section length of outer tube and inner tube injection slurries.Cement-sodium silicate
Biliquid volume proportion need according to gel time determine, it is desirable that the presetting period of cement-water-clay system be no more than 1min, eventually
The solidifying time is no more than 20min.
After the completion of first segment slip casting section slip casting, the slip casting section borehole space is filled using cement-water-clay system, when
After cement-water-clay system final set, slurries are converted into solid state by fluid state and have certain intensity, the slip casting section
It is successfully closed, grouting serous fluid later just will not enter the slip casting section, and expansion type stop grouting plug is moved to next section of slip casting section
Boundary on, carry out the slip casting of next section, and so on, to realize retrusive segmenting slip casting.Since cement-sodium silicate is starched
Liquid final setting time is short, and slip casting section closed process will not delay the excessive slip casting working time, fully meets mortar depositing construction to applying
The requirement of work efficiency rate.
The beneficial effects of the present invention are:
The rapid hardening morning powerful feature for making full use of cement-water-clay system, closes different notes by foot of hole paragraph by paragraph upwards
Starch section, only use a stop grouting plug during segmenting slip casting, compared to conventional segmented grouting mode used less a stop grouting plug and
Matched pipeline reduces the complexity of sublevel grouting device.And the segmentation caused by eliminating because of the failure of lower part stop grouting plug is lost
Phenomenon is lost, the success rate of segmenting slip casting is improved.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is single stop grouting plug retrusive segmenting slip casting process schematic；
Fig. 2 is single stop grouting plug retrusive sublevel grouting device grout outlet portion structure schematic diagram；
Fig. 3 is single stop grouting plug retrusive sublevel grouting device stock inlet portion structure schematic diagram；
Fig. 4 is single stop grouting plug retrusive sublevel grouting device cross section structure schematic diagram.
In figure: 1 --- inner tube, 2 --- outer tube, 3 --- water injection pipe, 4 --- expansion type stop grouting plug, 5 --- interior tube valve,
6 --- outer tube valve, 7 --- water filling tube valve, 8 --- inner tube check valve；9 --- outer tube check valve, 10 --- drilling,
11 --- first segment slip casting section, 12 --- second segment slip casting section, 13 --- n-th section of slip casting section, 14 --- slip casting section is closed
Section, 15 --- working face.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination；
As background technique is introduced, current retrusive segmenting slip casting method mainly has drilling rod retrusive, mini-valve tube
Two kinds of grouting methods such as retrusive, drilling rod retrusive grouting method use drilling rod disposal pore-forming, drilling rod directly as Grouting Pipe,
It is retreated using drilling rod and realizes retrusive segmenting slip casting, but the grouting method lacks effective isolation between different slip casting sections and arranges
It applies, causes slip casting controllability limited, it cannot be guaranteed that all slurries enter target slip casting section；Mini-valve tube retrusive slip casting is main
It is made of two kinds of Grouting Pipes of slip casting outer tube and slip casting core pipe, slip casting core pipe both ends are provided with stop grouting plug, utilize internal core pipe
It is mobile to realize segmentation, slurries enter between two stop grouting plugs by note medium, however mini-valve tube retrusive grouting mode needs make
With two stop grouting plugs, situations such as causing structure complex, component damage easily occurs during extensive mortar depositing construction, reduce
Slip casting efficiency., in order to solve technical problem as above, present applicant proposes a kind of single stop grouting plug retrogressings suitable for crack rock
Formula sublevel grouting device and application method can realize the segmenting slip casting to target slip casting region by the device and method, and have
Have the advantages that structure is simple and convenient to operate, is hardly damaged.
In a kind of typical embodiment of the application, as shown in Figure 1, being suitable for single stop grouting plug retrusive of crack rock
Sublevel grouting device, including inner tube 1, outer tube 2, water injection pipe 3, expansion type stop grouting plug 4, interior tube valve 5, outer tube valve 6, water injection pipe
Valve 7, inner tube check valve 8 and outer tube check valve 9；The expansion type stop grouting plug 4 by outer tube 2 penetrate through and be fixed on outer tube 2 it
On, it is connected inside the water injection pipe 3 and expansion type stop grouting plug 4, can be filled the water by water injection pipe 3 into expansion type stop grouting plug 4
Expand expansion type stop grouting plug；
The outer tube 2 is for conveying cement grout, and outer tube is being provided with outer tube valve 6 into slurry position, in pulp position
It is provided with outer tube check valve 9, prevents slurry reflux；
The inner tube 1 is set to inside outer tube 2, and inner tube 1 is set for conveying waterglass slurries, inner tube 1 into slurry position
It is equipped with interior tube valve, inner tube 1 is provided with inner tube check valve 8 in pulp position, prevents slurry reflux.
Further, the distance of the expansion type stop grouting plug centre distance inner tube check valve is the half of slip casting segment length,
In order to make pulp position at the center of slip casting section, reach better slip casting effect.
Further, the distance between the inner tube check valve and outer tube check valve are less than 10cm；In order to make in outer tube
Cement grout with the waterglass slurries in inner tube are as early as possible meeting and mixing, the time spent by grout cures is less.
In the present embodiment, drilling design depth 40m, design slip casting section are 20m~40m depth bounds, point 4 sections of notes
Slurry, slip casting segment length are designed as 5m, and injecting paste material is cement single slurry, and single-section design grouting amount is 5m3, design grouting pressure
2MPa.Cement-water-clay system volume ratio used by slip casting section is closed is determined as C:S=4:1, surveys presetting period 25s,
Final setting time 15min；Specific implementation steps are as follows:
Step 1: sublevel grouting device is made according to design slip casting segment length, expansion type stop grouting plug centre distance inner tube is unidirectional
The distance of valve is 2.5m, and the distance between inner tube check valve and outer tube check valve are 10cm.
Step 2: it drills on working face according to design hole location, terminates when drilling is to 40m depth.
Step 3: by sublevel grouting device tripping in first segment slip casting section corresponding position, expansion type stop grouting plug center is enabled to be located at
On the position depth 35m.
Step 4: expansion type stop grouting plug is filled the water by water injection pipe, target water injection pressure is set as 2.5MPa, reaches target
Water filling tube valve is closed after water injection pressure.
Step 5: carrying out normal slip casting by outer tube, and slurries enter corresponding slip casting section, when grouting pressure reach 2MPa,
Grouting amount reaches 5m3Afterwards, normal slip casting terminates.
Step 6: slip casting section is closed.Cement single slurry is injected by outer tube, waterglass, the two are injected by inner tube
C:S=4:1 is mixed by volume, after cement-water-clay system reaches initial set, is opened water filling tube valve removal expansion type and is only starched
Sublevel grouting device is retreated 5m by the inside water pressure of plug, and expansion type stop grouting plug center is enabled to be located on next section of slip casting section boundary.
Step 7: after the cement-water-clay system gel reaction time being more than 15min, forming slip casting section closed section,
Expansion type stop grouting plug is filled the water by water injection pipe, carries out the normal slip casting of next section of slip casting section later.
Step 8: step 4 is repeated to step 7, until reaching scheduled slip casting segmentation number.
In above method, expansion type stop grouting plug water injection pressure is higher than design grouting pressure, guarantees in design slip casting pressure
Expansion type stop grouting plug can sustain the pressure that slurries apply it under power.Normal grouting serous fluid uses cement single slurry.In step
In six, slip casting section is closed using cement-sodium silicate double liquid, outer tube injects cement single slurry, and inner tube injects water
Glass pulp, the total volume drilling volume corresponding not less than slip casting section length of outer tube and inner tube injection slurries.
In above method, the biliquid volume proportion of cement-sodium silicate needs to be determined according to gel time, it is desirable that cement-
The presetting period of waterglass slurries is no more than 1min, and final setting time is no more than 20min.
In above method, after the completion of first segment slip casting section slip casting, the slip casting area is filled using cement-water-clay system
Section borehole space, after cement-water-clay system final set, slurries are converted into solid state by fluid state and are had certain strong
Degree, the slip casting section are successfully closed, and grouting serous fluid later just will not enter the slip casting section, and expansion type stop grouting plug is moved to
On next section of slip casting section boundary, the slip casting of next section is carried out, and so on, to realize retrusive segmenting slip casting.Due to
Cement-water-clay system final setting time is short, and slip casting section closed process will not delay the excessive slip casting working time, fully meets
Requirement of the mortar depositing construction to construction efficiency.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (7)
1. a kind of single stop grouting plug retrusive sublevel grouting device suitable for crack rock, which is characterized in that including inner tube, outside
Pipe, water injection pipe, expansion type stop grouting plug, interior tube valve, outer tube valve, water filling tube valve, inner tube check valve and outer tube check valve；Institute
The expansion type stop grouting plug stated is penetrated through and be fixed on outer tube by outer tube, is connected inside the water injection pipe and expansion type stop grouting plug
Logical, can be filled the water by water injection pipe into expansion type stop grouting plug expands expansion type stop grouting plug；
The outer tube is being provided with outer tube valve into slurry position, is being provided in pulp position for conveying cement grout, outer tube
Outer tube check valve, prevents slurry reflux；
The inner tube is set to outer tube, and inner tube is being provided with inner tube into slurry position for conveying waterglass slurries, inner tube
Valve, inner tube are provided with inner tube check valve in pulp position, prevent slurry reflux.
2. a kind of single stop grouting plug retrusive sublevel grouting device suitable for crack rock as described in claim 1, feature
It is, the distance of expansion type stop grouting plug centre distance inner tube check valve is the half of slip casting segment length.
3. a kind of single stop grouting plug retrusive suitable for crack rock point as described in claim 1
Section grouting device, which is characterized in that the distance between inner tube check valve and outer tube check valve are less than 10cm.
4. the use of single stop grouting plug retrusive sublevel grouting device a method according to any one of claims 1-3 suitable for crack rock
Method, which is characterized in that specific steps are as follows:
Step 1: sublevel grouting device is made according to design slip casting segment length；
Step 2: it drills on working face according to design hole location, terminates when drilling is to projected depth；
Step 3: by sublevel grouting device tripping in first segment slip casting section corresponding position, expansion type stop grouting plug center is enabled to be located at first
On section slip casting segment boundary；
Step 4: expansion type stop grouting plug is filled the water by water injection pipe, target water injection pressure is higher than design grouting pressure, reaches mesh
Water filling tube valve is closed after marking water pressure；
Step 5: injecting cement single slurry only by outer tube, and cement single slurry enters corresponding slip casting section, when grouting pressure and
After grouting amount reaches design requirement, normal slip casting terminates；
Step 6: slip casting section is closed；
Cement single slurry is injected by outer tube, while waterglass is injected by inner tube, the two mixes in specific proportions, when cement-
After waterglass slurries reach initial set, the inside water pressure of water filling tube valve removal expansion type stop grouting plug is opened, by sublevel grouting device
A distance is retreated, expansion type stop grouting plug center is enabled to be located on next section of slip casting section boundary；
Step 7: after cement-water-clay system solidifies and has some strength, slip casting section closed section is formed, note is passed through
Water pipe fills the water expansion type stop grouting plug, carries out the normal slip casting of next section of slip casting section later；
Step 8: step 4 is repeated to step 7, until reaching scheduled slip casting segmentation number.
5. the application method suitable for single stop grouting plug retrusive sublevel grouting device of crack rock as claimed in claim 4,
It is characterized in that, the expansion type stop grouting plug water injection pressure is higher than design grouting pressure.
6. the application method suitable for single stop grouting plug retrusive sublevel grouting device of crack rock as claimed in claim 4,
It is characterized in that, the total volume drilling body corresponding not less than slip casting section length of the outer tube and inner tube injection slurries
Product.
7. the application method suitable for single stop grouting plug retrusive sublevel grouting device of crack rock as claimed in claim 4,
It is characterized in that, the biliquid volume proportion of the cement-sodium silicate needs to be determined according to gel time, it is desirable that cement-water glass
The presetting period of glass slurries is no more than 1min, and final setting time is no more than 20min.
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|---|---|---|---|
| CN201811182774.5A CN109098687B (en) | 2018-10-11 | 2018-10-11 | Single-stop-grouting-plug retreating type segmented grouting device and method applicable to fractured rock mass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811182774.5A CN109098687B (en) | 2018-10-11 | 2018-10-11 | Single-stop-grouting-plug retreating type segmented grouting device and method applicable to fractured rock mass |
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| CN109098687B CN109098687B (en) | 2023-09-05 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109555142A (en) * | 2019-01-17 | 2019-04-02 | 中建四局第建筑工程有限公司 | A kind of constructing device for basement rock two-shot grouting |
| CN110259383A (en) * | 2019-07-04 | 2019-09-20 | 山东大学 | A kind of protrusive bores note integrated device and application method |
| CN110424892A (en) * | 2019-07-12 | 2019-11-08 | 中煤科工集团西安研究院有限公司 | A kind of gushing water administering method of the nearly horizontal orientation drilling of mine |
| CN110469347A (en) * | 2019-09-03 | 2019-11-19 | 重庆城建控股(集团)有限责任公司 | The double slurries grouting methods of rich water tunnel |
| CN110529155A (en) * | 2019-09-26 | 2019-12-03 | 中铁隧道局集团有限公司 | A kind of drill bit only starches drilling rod and is segmented retrusive grouting method |
| CN110617029A (en) * | 2019-09-16 | 2019-12-27 | 中国矿业大学 | Drilling segmented retreating type grouting method |
| CN110984130A (en) * | 2020-01-07 | 2020-04-10 | 湘潭大学 | Slurry stopping system and method for preventing blockage and slurry return outside hole of crushing belt |
| CN112814613A (en) * | 2021-01-05 | 2021-05-18 | 神华神东煤炭集团有限责任公司 | Hole sealing device and hole sealing method for water detection and drainage drill hole in mine |
| CN112854194A (en) * | 2021-01-15 | 2021-05-28 | 山东科技大学 | Device for retreating type grouting and using method |
| CN112963158A (en) * | 2021-05-18 | 2021-06-15 | 北京城建道桥建设集团有限公司 | Double-liquid grouting method and slurry for pore stratum |
| CN113684831A (en) * | 2021-05-08 | 2021-11-23 | 中铁七局集团第三工程有限公司 | Controllable bidirectional grout stopping device for sleeve valve pipe |
| CN117552745A (en) * | 2023-12-25 | 2024-02-13 | 中煤科工开采研究院有限公司 | Deep hole retreating grouting hole sealing device and method |
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